Update comments, fix style

Author: shivaram

sql/core/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala

@@ -971,13 +971,13 @@ object StaticSQLConf {
   }
 
   val DEFAULT_WAREHOUSE_PATH = buildConf("spark.sql.default.warehouse.dir")
-    .doc("The default location for managed databases and tables. " +
-         "Used if spark.sql.warehouse.dir is not set")
+    .doc("Default location used for managed databases and tables " +
+         "if spark.sql.warehouse.dir is not set")
     .stringConf
     .createWithDefault(Utils.resolveURI("spark-warehouse").toString)
 
   val WAREHOUSE_PATH = buildConf("spark.sql.warehouse.dir")
-    .doc("The location for managed databases and tables.")
+    .doc("The default location for managed databases and tables.")
     .stringConf
     .createOptional
 

sql/core/src/main/scala/org/apache/spark/sql/internal/SharedState.scala

@@ -56,7 +56,7 @@ private[sql] class SharedState(val sparkContext: SparkContext) extends Logging {
         s"hive.metastore.warehouse.dir ('$hiveWarehouseDir').")
       hiveWarehouseDir
     } else if (sparkContext.conf.contains(WAREHOUSE_PATH.key) &&
-               sparkContext.conf.get(WAREHOUSE_PATH).isDefined) {
+        sparkContext.conf.get(WAREHOUSE_PATH).isDefined) {
       // If spark.sql.warehouse.dir is set, we will override hive.metastore.warehouse.dir using
       // the value of spark.sql.warehouse.dir.
       val sparkWarehouseDir = sparkContext.conf.get(WAREHOUSE_PATH).get